ABB AC Motor HXR400

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Brand Name:ABBModel Number:HXR 400 SeriesType:Squirre Cage Motor
Frequency:50.2 HzOutput Power:350 KWProtect Feature:Explosion-proof
Phase:Three-phaseCertification:CEAC Voltage:690V
Place of Origin:Shanghai China (Mainland)Efficiency:IE 1Packaging Detail::EXPORT STANDAR WOODEN CASE
StructureAsynchronous MotorFunctionDriving UsageUniversal







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Q:Why does the AC motor turn?Do I feel that the coil is not in a steady state?
When three to three alternating current in the stator winding through the symmetry, it produced a synchronous speed n1 along the stator and rotor roundfor space in a clockwise rotation of the rotating magnetic field. Due to the rotation speed of rotating magnetic field to N1, the beginning of the rotor conductors is static, so the rotor conductor will cut the stator rotation the magnetic field induced electromotive force (EMF direction dingze judge with the right hand).
Q:What is AC induction motor?
The rotor does not directly enter the AC, the rotor is equipped with a closed loop conductor. The rotating magnetic field does relative motion with the rotor, and the closed conductor on the rotor cuts the magnetic field lines to produce an electric current, which then interacts with the rotating magnetic field of the stator so as to drive the rotor to rotate. As described above, the current in the rotor is induced by the rotating magnetic field of the stator, so it is called induction motor.
Q:What is the difference between AC variable frequency speed control and DC variable frequency speed regulation?
AC variable speed DC speed is widely used because the ratio of AC motor, not the principle of frequency conversion has the advantage of frequency control can only be applied to control, and the torque is unable to achieve precise control, the reason is very simple, the DC motor armature and field is coupled, are separated, such of armature current and exciting current to achieve accurate control. The AC speed control, armature current and exciting current is coupled, is unable to achieve precise control, although the frequency current vector control, which is based on the modern control theory, through the vector transformation, the armature current and exciting current coupling in AC motor solutions, in order to control, which is the principle of simulation DC speed regulation. But it is difficult to control the DC speed. Therefore, in the rolling mills, paper and other requirements of the high torque industry, DC speed control is still widespread. And only for speed control, at present, variable frequency speed regulation can be realistic DC speed control characteristics, because the advantages of AC motor is DC motor can not do.
Q:Can AC motors use direct current?
Ordinary asynchronous AC motors are not allowed.But some live brush AC motors are slightly modified and can be powered by direct current.
Q:Winding of single-phase AC motor?
Single motor is divided into main winding, secondary winding, main winding is working, and negative winding is started. The three motors are divided into main and secondary windings, and the three sets of coils are all working.
Q:How to distinguish between DC motor and AC motor?
The stator of a direct current motor is a fixed magnetic field, and the direct current changes through the brush of the rotor to form a magnetic field around it, thereby rotating in the stator. In industrial enterprises, due to relatively reliable DC power supply, DC motor is generally used to require reliable operation of mechanical or mechanical spare security; and because the DC motor with variable speed input voltage can also change, so often need to control local DC motor are many, such as cars, electric locomotive and so on.
Q:Where are the low voltage AC asynchronous motors used in electric machines?
Low voltage AC asynchronous motors commonly used in industrial electrical equipment are typically three-phase asynchronous motors.Three phase asynchronous motor can be used to drive all kinds of general machinery and equipment, such as compressors, pumps, fans, mixers, crushers, cutting machines, conveying machinery and other mechanical equipment, etc.. In the mining, machinery, metallurgy, petroleum, chemical, power plants and other industrial and mining enterprises as prime movers.
Q:Motor starting mode
Y, reduced voltage startMotor stator winding for delta connection, start with Y, close to the speed of the rated speed to the operation, the startup, reduce the stator winding of each phase to 58% power supply voltage, the starting current is directly at the start of 33%, the starting torque directly at the start of 33. A small startup current, start torque is small.The advantages of Y step-down start is not required to add boot device, a start switch or AC contactor control equipment can be achieved, the drawback is only used for delta connected motor, asynchronous motor can not load start.
Q:How do AC motors keep in the same direction?
Because the working principle of AC motor stator is formed in a rotating magnetic field, then the rotor itself is a closed loop (induction motor) or a magnet (synchronous motor), the rotor rotation direction of magnetic field and steering only related to the rotation direction of magnetic field has not changed, turn to constant.
Q:For AC motors, when the voltage is constant, the frequency of the voltage becomes higher or lower, so what is the impact on the motor?.
Induction motor, power frequency rise will make the speed increases, the rise of the motor inductance frequency increase, the current will be reduced, reducing the temperature rise of the motor current will decline.When the power supply frequency decreased, motor speed will decline, the current decline due to the increased motor inductance, the temperature should be increased.

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